(1) We are going to incentivise high quality decks by allowing people to sell access to their decks

(2) The main problem we see with Anki public decks is that the user themselves decides whether they got the question "right" or not when reviewing the cards. This lack of a "teacher" means that it is very very difficult to learn using someone else's cards.

You basically end up kind of getting something wrong but then saying it was right anyway. Do that a few times and your trust & investment in the process goes and you'll eventually you lose motivation to carry on with the deck.

Save All decks are different. WE decide whether you got it right or not, not you. This makes it much easier for you to learn using someone else's decks

I don't understand how your 2nd point is a problem. If you already say you're right even though you are not, you won't lose any motivation to carry on because you have no motivation already.

If you don't want to learn (or memorize), no technique or tool will allow you to learn. Make a tool that solves this "problem", and the user will simply find other ways for running away, like not using the tool.

See my other comment, but I wonder if someone could coordinate an open source deck using github. It would have to use a text-based flashcard deck format, and as with other open source, would require some coordination to curate the deck.

That said, I can see some negatives as I have read that for learning, it's generally better to construct your own flashcards.